MeV neutrino dark matter: relic density, lepton flavour violation and electron recoil
Abstract Right-handed neutrinos with MeV to GeV mass are very promising candidates for dark matter (DM). Not only can they solve the missing satellite puzzle, the cusp-core problem of inner DM density profiles, and the too-big-to fail problem, i.e. that the unobserved satellites are too big to not h...
Main Authors: | , , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
SpringerOpen
2019-11-01
|
Series: | Journal of High Energy Physics |
Subjects: | |
Online Access: | http://link.springer.com/article/10.1007/JHEP11(2019)129 |
id |
doaj-e280bcf8b84e4325866f8900b00f4b69 |
---|---|
record_format |
Article |
spelling |
doaj-e280bcf8b84e4325866f8900b00f4b692020-11-25T04:11:56ZengSpringerOpenJournal of High Energy Physics1029-84792019-11-0120191112610.1007/JHEP11(2019)129MeV neutrino dark matter: relic density, lepton flavour violation and electron recoilJuri Fiaschi0Michael Klasen1Miguel Vargas2Christian Weinheimer3Sybrand Zeinstra4Institut für Theoretische Physik, Westfälische Wilhelms-Universität MünsterInstitut für Theoretische Physik, Westfälische Wilhelms-Universität MünsterInstitut für Kernphysik, Westfälische Wilhelms-Universität MünsterInstitut für Kernphysik, Westfälische Wilhelms-Universität MünsterInstitut für Theoretische Physik, Westfälische Wilhelms-Universität MünsterAbstract Right-handed neutrinos with MeV to GeV mass are very promising candidates for dark matter (DM). Not only can they solve the missing satellite puzzle, the cusp-core problem of inner DM density profiles, and the too-big-to fail problem, i.e. that the unobserved satellites are too big to not have visible stars, but they can also account for the Standard Model (SM) neutrino masses at one loop. We perform a comprehensive study of the right-handed neutrino parameter space and impose the correct observed relic density and SM neutrino mass differences and mixings. We find that the DM masses are in agreement with bounds from big-bang nucleosynthesis, but that these constraints induce sizeable DM couplings to the charged SM leptons. We then point out that previously overlooked limits from current and future lepton flavour violation experiments such as MEG and SINDRUM heavily constrain the allowed parameter space. Since the DM is leptophilic, we also investigate electron recoil as a possible direct detection signal, in particular in the XENON1T experiment. We find that despite the large coupling and low backgrounds, the energy thresholds are still too high and the predicted cross sections too low due to the heavy charged mediator, whose mass is constrained by LEP limits.http://link.springer.com/article/10.1007/JHEP11(2019)129Beyond Standard ModelCosmology of Theories beyond the SMNeutrino Physics |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Juri Fiaschi Michael Klasen Miguel Vargas Christian Weinheimer Sybrand Zeinstra |
spellingShingle |
Juri Fiaschi Michael Klasen Miguel Vargas Christian Weinheimer Sybrand Zeinstra MeV neutrino dark matter: relic density, lepton flavour violation and electron recoil Journal of High Energy Physics Beyond Standard Model Cosmology of Theories beyond the SM Neutrino Physics |
author_facet |
Juri Fiaschi Michael Klasen Miguel Vargas Christian Weinheimer Sybrand Zeinstra |
author_sort |
Juri Fiaschi |
title |
MeV neutrino dark matter: relic density, lepton flavour violation and electron recoil |
title_short |
MeV neutrino dark matter: relic density, lepton flavour violation and electron recoil |
title_full |
MeV neutrino dark matter: relic density, lepton flavour violation and electron recoil |
title_fullStr |
MeV neutrino dark matter: relic density, lepton flavour violation and electron recoil |
title_full_unstemmed |
MeV neutrino dark matter: relic density, lepton flavour violation and electron recoil |
title_sort |
mev neutrino dark matter: relic density, lepton flavour violation and electron recoil |
publisher |
SpringerOpen |
series |
Journal of High Energy Physics |
issn |
1029-8479 |
publishDate |
2019-11-01 |
description |
Abstract Right-handed neutrinos with MeV to GeV mass are very promising candidates for dark matter (DM). Not only can they solve the missing satellite puzzle, the cusp-core problem of inner DM density profiles, and the too-big-to fail problem, i.e. that the unobserved satellites are too big to not have visible stars, but they can also account for the Standard Model (SM) neutrino masses at one loop. We perform a comprehensive study of the right-handed neutrino parameter space and impose the correct observed relic density and SM neutrino mass differences and mixings. We find that the DM masses are in agreement with bounds from big-bang nucleosynthesis, but that these constraints induce sizeable DM couplings to the charged SM leptons. We then point out that previously overlooked limits from current and future lepton flavour violation experiments such as MEG and SINDRUM heavily constrain the allowed parameter space. Since the DM is leptophilic, we also investigate electron recoil as a possible direct detection signal, in particular in the XENON1T experiment. We find that despite the large coupling and low backgrounds, the energy thresholds are still too high and the predicted cross sections too low due to the heavy charged mediator, whose mass is constrained by LEP limits. |
topic |
Beyond Standard Model Cosmology of Theories beyond the SM Neutrino Physics |
url |
http://link.springer.com/article/10.1007/JHEP11(2019)129 |
work_keys_str_mv |
AT jurifiaschi mevneutrinodarkmatterrelicdensityleptonflavourviolationandelectronrecoil AT michaelklasen mevneutrinodarkmatterrelicdensityleptonflavourviolationandelectronrecoil AT miguelvargas mevneutrinodarkmatterrelicdensityleptonflavourviolationandelectronrecoil AT christianweinheimer mevneutrinodarkmatterrelicdensityleptonflavourviolationandelectronrecoil AT sybrandzeinstra mevneutrinodarkmatterrelicdensityleptonflavourviolationandelectronrecoil |
_version_ |
1724416424523333632 |